Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1982CITATION L4-151 2.5LREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLESERVICE AND REPAIROVERHAULINPUT UNIT PARTS
1982 Chevrolet Citation L4-151 2.5L
Input Unit Parts
1982 Chevrolet Citation L4-151 2.5LSECTION Input Unit Parts
1. Check input drum for wear or damage, see image. Roll pins are angled. Do not attempt to straighten.
2. Install input drum on the reaction sun gear.
3. Check input sun gear splines and teeth for damage or wear. Install gear into case with chamfered side facing upward.
4. Check input carrier assembly. Pinion pins must be tight and not rotate. Check pinions for rough operation, tilt or other damage. Pinion endplay should be .24-.69 mm (.009-027 inch), see image.
5. Check both four (4) tanged thrust washers for wear or damage.
6. Install smaller input carrier to input sun gear four (4) tanged thrust washer on the pinion side of input carrier and retain with petroleum jelly. Install larger input carrier to input internal gear four (4) tanged thrust washer on the input carrier and retain with petroleum jelly, see image above step one.
7. Install input carrier into case, see image.
8. Check input internal gear for cracks or other damage. Install input internal gear into case.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.